- Companies
- Plumbers and heating engineers
- Pontypool
- Blackstone Mechanical Ltd
Blackstone Mechanical Ltd
- Company number
- 17412624
- Incorporated
- 20 Aug 2026
- Registered office
- 24 Varteg Road, Varteg, Pontypool, NP4 7PZ
- Nature of business
- Plumbing, heat and air-conditioning installation
Blackstone Mechanical Ltd is a newly incorporated private limited company registered in Pontypool, company number 17412624, one of 40 plumbing and heating companies in Pontypool. Its next accounts are due at Companies House on 20 May 2028, and its first CT600 is due at HMRC on 19 August 2028.
Key dates
This company has not filed accounts yet. First accounts are due 21 months after incorporation, and the first period can run longer than a year.
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Where Blackstone Mechanical Ltd is registered
The registered office is in Pontypool (NP4), in the Torfaen local authority area, Wales. Show NP4 7PZ on a map.
Other trade companies in NP4
- BL Home Solutions LtdRoofers
- Airmech Solutions LtdPlumbers and heating engineers
- Redmont Roofing LtdRoofers
- Otto Property Developments LtdProperty developers
- Nurture Real Estate LtdProperty developers
- Keltic Property Services LtdFinishing trades
- Dassh LtdProperty developers
- WJW Property Maintenance LtdFinishing trades
What happens if Blackstone Mechanical Ltd files late
Companies House charges an automatic penalty the day after the deadline, and it rises the longer the accounts are late. These are the dates for this company's accounts due on 20 May 2028.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 21 May 2028 to 20 Jun 2028 | £150 |
| 1 to 3 months late | 21 Jun 2028 to 20 Aug 2028 | £375 |
| 3 to 6 months late | 21 Aug 2028 to 20 Nov 2028 | £750 |
| More than 6 months late | From 21 Nov 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Sep 2028 | £200 |
| 3 months late | 30 Nov 2028 | another £200 |
| 6 months late | 28 Feb 2029 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Aug 2029 | another 10% of any unpaid tax |
For returns filed on or after 1 April 2026. Late three times in a row and the £200 penalties become £1,000 each.
Company details
As held on the Companies House register.
- Company number
- 17412624
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 20 August 2026
- Registered office
- 24 Varteg Road, Varteg, Pontypool, NP4 7PZ
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 31 August (accounting reference date)
- Accounts type
- No accounts filed yet
Filing notes for plumbing and heating companies
Plumbing and heating companies frequently work under CIS for main contractors and also directly for homeowners, so turnover can mix CIS and non-CIS income.
Similar companies in Pontypool
Other active plumbing and heating companies registered in Pontypool.
- Blackwell Heating and Plumbing (Wales and South West) Ltd2026
- County Bathrooms & Heating Ltd2015
- Dew Mechanical Limited2024
- Elite Aircon Limited2020
- Gareth Webb Heating Services Ltd2022
- Gary Needs Plumbing & Heating Ltd2014
- Home Heating Team Ltd2026
- Installation Professional Ltd2024
All plumbing and heating companies in Pontypool · All trades in Pontypool · Plumbers and heating engineers across the UK
Frequently asked questions
When are Blackstone Mechanical Ltd's accounts due?
Blackstone Mechanical Ltd's next accounts are due at Companies House by 20 May 2028 (in 585 days), covering the period to 31 August 2027.
When is Blackstone Mechanical Ltd's CT600 due?
The first accounts cover more than 12 months, so there are two Company Tax Returns: one for the 12 months to 19 August 2027, due by 19 August 2028, and one for the period to 31 August 2027, due by 31 August 2028. Corporation tax is payable 9 months and 1 day after the end of each.
Is Blackstone Mechanical Ltd still trading?
Blackstone Mechanical Ltd is listed as active on the Companies House register as of 1 Oct 2026. Active means it has not been dissolved or entered insolvency; it does not show whether it is currently taking on work.
What does Blackstone Mechanical Ltd do?
Blackstone Mechanical Ltd is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is Blackstone Mechanical Ltd?
Blackstone Mechanical Ltd was incorporated on 20 August 2026, less than a year ago.
What is the penalty if Blackstone Mechanical Ltd files its accounts late?
Companies House charges £150 if the accounts are up to 1 month late, £375 up to 3 months, £750 up to 6 months and £1,500 after that, doubled if the previous year's accounts were also late. HMRC charges £200 for a CT600 filed a day late and another £200 at 3 months.
Official records
View Blackstone Mechanical Ltd on Companies House for filed documents, officers and the full history.
Based on the Companies House register (snapshot 1 Oct 2026). Deadlines are worked out from the register and assume a standard accounting period; a change of year end or a short period moves them. This page is general information, not tax or accountancy advice.